6138742042 has 4 divisors (see below), whose sum is σ = 9208113066. Its totient is φ = 3069371020.

The previous prime is 6138742009. The next prime is 6138742111. The reversal of 6138742042 is 2402478316.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6012606681 + 126135361 = 77541^2 + 11231^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6138741992 and 6138742010.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1534685509 + ... + 1534685512.

Almost surely, 2^6138742042 is an apocalyptic number.

6138742042 is a deficient number, since it is larger than the sum of its proper divisors (3069371024).

6138742042 is a wasteful number, since it uses less digits than its factorization.

6138742042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069371023.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 6138742042 is about 78350.1247095370. The cubic root of 6138742042 is about 1831.0201685384.

The spelling of 6138742042 in words is "six billion, one hundred thirty-eight million, seven hundred forty-two thousand, forty-two".